Gerbing Calor filled products, such as the Womens 7V Calor Vest, are made from synthetic fibers that are arranged in different sized filaments which mimics downs lofty clusters. The short staples are extremely soft and airy, while the continuous filaments are less compressible and are not prone to tearing or clumping. The combination of the two fibers intertwine and create dense, warmth-trapping air pockets, and retain their shape more consistently over time. These synthetic fibers are packed into a double layer of apparel baffles to provide added warmth and insulation to help keep fibers from escaping through the shell and maintain the heat inside the garment. The light synthetic insulation is protected by a durable nylon shell fabric that is finished with a water and wind resistant treatment to shed light moisture upon contact. When paired with Gerbings patented heated technology, Calor filled garments are a great way to stay warm during any outdoor activity and will last from season to season.